Programmer Group

With MSSQL2005, can I truncate a table with foreign key constraints if I truncate the subtable first (the table with the primary key of the FK relationship)? I know I can too Use DELETE without where clause, then RESEED identity (or) Delete FK, truncate the table, and recreate FK. I don't think I can use any of the above options ...

Stored procedure A set of SQL statements used to complete specific database functions, which are compiled and stored in the database system. In use, the user calls and executes the stored procedure by specifying the defined stored procedure name and giving the corresponding stored procedure parameters, thus completing one or a series of databas ...

1. Variable declaration and assignment All input and output variables, or variables in use, are either declared with set or declare before they are used Otherwise, it will result in an undefined variable error. Univariate assignment DECLARE @id int(16); set @a = '12'; set @b = (select count(*) from user); Multivariate assig ...

1. Background introduction In order to achieve the goal of employee leave, overtime and other personnel process flow and attendance automation, it is necessary to dock the personnel process in OA with EHR system, so that employees only need to fill in application forms, and enter EHR system automatica ...

How to write a stored procedure that imports data from a CSV file and populates tables? #1 building You can also use pgAdmin, which provides a GUI to import. Here it is. Show in SO thread . The advantage of using pgAdmin is that it is also applicable to remote databases. However, much like the previous solution, you will need to have ...

Recently, I have set up my personal blog. Here is the link: Babble of tobe The article will be updated in blogs and public numbers first. The so-called Transaction is to maintain the integrity of the database by ensuring that batch operations are either fully executed or not executed at all. Take A rotten Street example: A transfers 1000 yuan t ...

Functions are usually instrumental, and stored procedures are usually complex operations of DML Function has return type return create function getBookCount return number as begin declare book_count number; begin select count(*) into book_count from t_book; return book_count; end; end getBookCount; set serverou ...

1, System encapsulation function MySQL has many built-in functions, which can quickly solve some business requirements in development, including process control function, numerical function, string function, date time function, aggregation function, etc. The functions commonly used in these classifications are listed below. 1. Control flow f ...

Oracle storage functions The storage function is also a named PLSQL block. --Note: the stored procedure has no return value, but the stored function has a return value. The difference between stored procedure and stored function Generally speaking, the difference between a procedure and a function is that a function can ...

A stored Procedure is a set of SQL statements that are compiled and stored in a database to complete a specific function. The user can execute it by specifying the name of the stored Procedure and giving parameters. Stored procedures can contain logical control statements and data manipulation statements, which can accept para ...